Machine for molding metallic tubes by centrifugal force.



D. 8. DE LAVAUD & F. ARENS, JR.

MACHINE FOR MOLDING METALLIC TUBES BY CENTRIFUGAL FORCE.

APPLICATION FILED NOV. 6, I915- Patented Sept. 26, 1916.

3 SHEETS-SHEET 1.

l/WE/V Tom A TTORNE Y D. S. DE LAVAUD & F. ARENS, In. MACHINE FOR MOLDING METALLIC TUBES- BY CENTRIFUGAL FORCE. APPLICATIOI! FILED NOV. 6,1915- 1,199,353. PatentedSepfl26, 1916.

3 SHEETS-SucET 2- ,4 TTOR/VEY D. S. DE LAVAUD. & F. ARENS, In.

MACHINE FOR MOLDING METALLIC TUBES BY CENTRIFUGAL FORCE.

APPLICATION FILED NQV- 6,1915.

1 ,1 99,353 Patented Sept. 26, 1916.

3 SHEETS-SHEET 3.

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UNITED STATES PATENT OFFICE.

DIMITRI SENSAUD DE LAVAUD AND FERNANDO ALRENS, J'R., OF SAG PAULO, BRAZIL.

Specification of Letters Patent.

Patented Sept. 26, 1916.

Application filed November 6, 1915. Serial No. 59,928.

To all whom it may concern Be it known that we, DIMITRI SENSAUD DE Lavam) and FERNANDO ARENS, Jr., citizens of Brazil, South America, residing at Sao Paulo, State of Sao Paulo, Brazil, South America, have invented new and useful Improvements in Machines for Molding Metallic Tubes by Centrifugal Force, of which the following is a specification.

This invention refers to the improvements in machines for molding metallic tubes as herein below described.

In the accompanying drawing, a machine, in which the referred-to improvements are embodied, is represented.

Figure l is a longitudinal vertical section. Fig. 2 is a plan partly in section with parts broken away (without the mold.) Fig. 3 is an elevation partly in section of the end of the machine from which the molded tube is discharged. Fig. 4 is an elevation partly in section of the other, front end. Fig. 5 shows in section the attachment for ejecting the cast tube, placed in operative position. Fig. 6 is an end view of the attachment for ejecting the cast tube.

The machine includes the following parts: a metallic mold A open at the ends, for molding the external surface of the metallic tube, which mold may be either one sole piece, or (as the design shows) be formed by different pieces joined one to the other; a mold or form of sand B for the inside surface of the mouth of the tube to be molded, that is to say for the internal surface of the part of this tube destined to receive the smaller extremity of another similar tube; a tubular metallic piece C, which supports themold of sand B, and on whose outer extremity a flange c is formed whose anterior surface is in contact with the adjacent end face of the mold A. The said tubular piece is maintained in this position in the mold A by any suitable means, which may be provided in this mold or in the said piece or in these two parts, and which will not obstruct the corresponding discharge end of the tubular piece. In the specimen represented, these means comprise four clamps d mounts ed on pivotal bearings 03 on the mold A and having oppositely inclined outer surfaces d and d and being surrounded by a riiig c coactlng therewith as a cam which in its rearmost extreme position (shown in Fig. 1) engages the surfaces (1 of the clamps and tightens the same in such a way as to C, in order that the said piece may be removed from the mold A, so as to permit discharge of the molded tube from the mold.

The terminal face of the mouth of the tube is molded upon a part of the internal face of the flange c of the support C, and the terminal face of the other extremity of the tube is molded upon the inner fiatface of a metallic ring f, having a diameter equal to that of the internal cylindrical face of the niold A and introduced into this mold.

The whole body formed by the mold A, mold of sand B supported by the tubular piece C secured in the mold, and by the ring f'in its place in the mold, constitutes the revolving shell, that is to say the cage destined to be put in rotation upon the horizontal axis of the mold. The external face of the tube, the internal face of its mouth, and its terminal faces are formed upon the molding surfaces of the parts of the cage above described. The molten metal is poured into the mold uniformly and simultaneously into all the points of the lower part of the cylindrical face of the mold A and descends into the lower part of the space situated between the mold A and the mold of sand B, and the metal poured in distributes itself with uniformity throughout the said surfaces and space and forms the desired tube, by .the rotatory action of the shell and of the centrifugal force generated and without the help of a penetrating piece for the body of the tube, such as is generally used in tube molds.

The shell rests freely upon little roller wheels 3 and 4 mounted on two parallel or equidistant horizontal axles 1 and 2, which may gyrate upon hearings in a block. These bearings may be fixed, or (as shown) be adj ustable in a plane at right angles to the axes of the said axles, so that the position of the latter, and therefore of their little roller wheels, can be adjusted by adequate means, to the dimensions of the external diameter of the shell.

In the machine represented, the axles 1 and 2, with the little roller Wheels 3 and 4, which support the shell, are mounted on bearings 5, 6, which can be adjusted in the said manner upon their supports by means of endless screws 5 and 6 which are adapted to be operated manually by means of the hand wheels 7 and 8, respectively.

Means are used to prevent longitudinal displacement of the shell. In the machine represented, these means consist of two annular flanges 3 and P on the shell which keep in contact with the opposite sides of the little roller wheels 3 and 4 at the front end of the machine.

The axle l is moved by any suitable means such as the power transmission mechanism 1*, to the end that, by means of its little roller wheels 3 the shell is put in motion and rotates during the process of .the molding of the tube; the accessories of the other axle serve merely for supporting the cage or shell.

For the purpose of pouring the molten metal in a state of fusion into the interior of the shell, the machine is provided with an apparatus properly adapted for such pouring in of the molten metal simultaneously and with uniformity over all the extent of that part of the mold corresponding to the body of the tube about to be molded, and a portion of the metal thus poured in will descend into the space between the molding surfaces for the pocket of the tube, and all the metal will be distributed over the whole surface of the mold by the action of the centrifugal force generated by the rotation of the shell. For this purpose the metal may be poured in by extravasation through an opening in the upper part of the pouring-1n apparatus, held in a fixed position, or by the referred-to opening at the top, by oscillation of the mold around the axle of the body of the tube.

The supplying apparatus for the pouring-in of the molten metal attached by one of its extremities to a car, may be utilized for throwing out the molded tube from the shell, by means of an attachment rigged up for the occasion on the outside extremity of the said supplying apparatus, when the car advances anew to place the supplier in its operative position within the shell. After the tube is thrown out, the referredto attachment is removed, so as to be replaced once more when the car again advances.

In the machine shown the supplying apparatus V is in the form of a tubular metallic body, which, in its upper part, has a longitudinal opening a of a length equal to that of the cylindrical part of the shell and the portion of the tube coextensive with this opening is lined on the inside with some refractory material and is closed in front by a wall of this material. The rear end portion 42 of the tubular body or trough V is provided with a hopper .11 in communication with the interior thereof. In the machine represented, the supplying apparatus V is supported at its rear extremity by a car 10, running on guiding lines 11, parallel to the longitudinal axis of the shell and mounted in a frame-structure 11*"-. In this frame-work there is also mounted a screw 12, screwed into a nut 13 secured to the car, and in the drawing, the numeral 1i indicates in a general way the means of transmission and other connections which move the car'forward and backward, along the guiding lines, by means of some motive force. In the machine represented, 16 indicates a hand wheel by means of which the screw can be-moved. After the supplying apparatus has been introduced into the shell, its free end is supported and secured in its exact operative position by means of a collapsible supporting arm 25, which is pivotally connected at its lower end to the machine at 17 (see Fig. and is provided in its upper end with an opening 26 adapted to aline with the axis of the mold and receive a pin 27 which projects from'the free end of the pouring-in trough. The supporting arm '25 is adapted to be secured automatically, upon arrival at its upright, operative position, by means of the spring-actuated latch 28, which has a pedal 29 that may be depressed to release the latch when it is de-' sired to swing the arm 25 into its collapsed position clear of'the adjacent end of the mold.

terminal faces of the tube is molded, can

be mounted on the supplying apparatus V (as shown) so as to be introduced into its operative place in the shell, by the advancing movement of the supplying apparatus, and to beremoved from within the shell, by the backward or return movement of the supplying apparatus. In the machine represented, the ring f is fixed with respect to the supplying apparatus and is securely held between grips or blocks 15, in its place on the said supplying apparatus which corresponds to the exact place within the shell in which the said ring has to be fixed.

In pouring the metal into the mold, the supplying apparatus can be. maintained stationary in its operative position and the metal caused to overflow the edges of its longitudinal opening v or it may be rotated about its axis of the shell, in order to empty the metal through the said opening. In the machine represented, the supplying apparatus V is tippable, and for this reason it is mounted-0n bearings 21 and 22 suitable for that purpose in the car 10 and in the frame structure 11, respectively.

' lVhile the molding processis being done the shell is kept cool by any suitable means. In the machine represented a system of irrigating pipes 23 serve for this puropse and'these pipes squirt water upon the shell;

the water is collected in a tank 18 which has drain pipe outlet 19.

Briefly: we claim as the constituting points and characteristics of the invention:

1. A centrifugal tube molding machine comprising a rotatable mold for the peripheral surfaces of the tubes to be formed, means for rotating the said mold, means for molding the end faces of the tubes, at longitudinally movable filling trough adapted to extend through the mold in operative position and to be withdrawn completely from one end of the latter into inoperative position, a movable carriage permanently supporting the trough at the last-mentioned end of the mold, means for operating the said carriage toward and away from the mold, and means for temporarily supporting the opposite end of the trough when in its operative position.

2. A centrifugal tube molding machine comprising. a rotatable mold for the peripheral surfaces of the tubes to be formed, means for rotating the said mold, means for molding the end faces of the tubes, a longitudinally movable filling trough adapted to extend through the mold in operative position and to be withdrawn completely from one end of the latter into inoperative position, a movable carriage permanently supporting the trough at the last-mentioned end of the mold, means for operating the said carriage toward and away from the mold, and a device for temporarily supporting the opposite end of the trough when in its operative position, the said device being adapted to be moved into inoperative position clear of the adjacent mold end. i

3. A centrifugal tube molding machine comprising a rotatable mold for the peripheral surfaces of the tubes to be formed,

, means for rotating the said mold, means for molding the end faces of the tubes, a longitudinally movable filling trough adapted to extend through the mold in operativeposition and to be withdrawn completely from one end of thelatter into inoperative position, a movable carriage permanently supportingthe trough at the last-mentioned end of-the mold, means for operating the said carriage toward and away from the mold, said troughv being provided at the end thereof opposite to the carriage with a projecting pin, a supporting armrprovided .exteriorly at the opposite end of the mold from the carriage, the said arm' being mounted for movement 1nto..operat1ve -position with one of its ends close in front of the adjacent mold end and laterally into inoperative position clear of the said mold end, the said arm being further provided in the said end with an openingadapted to reeeiye the trough pin when in operative position' to supportzthe trough temporarily therein,

4. A centrifugal tube molding machine comprising a rotatable mold for the peripheral surfaces of the tubes to be formed, means for rotating the said mold, meansfor molding the end faces of the tubes, a longitudinally movable filling trough adapted to extend through the mold in operative position and to be withdrawn completely from one end of the latter into inoperative position, a movable carriage permanently supporting the trough at the last-mentioned end of the mold, means for operating the said carriage toward and away from the mold, said trough being provided at the end thereof opposite to the carriage with a projecting pin,-a supporting arm cooperating with said pin to temporarily support said trough, and releasable means for securing the supporting arm in its operative position.-

5. A centrifugal tube molding machine comprising a rotatable mold for the peripheral surfaces of the tubes to be formed, means for rotating the said mold, means for molding the end faces of the tubes,. a longitudinally movable filling trough adapted to extend through the mold in operative position and to be withdrawn completely from one end of the latter into inoperative position, a movable carriage. permanently supporting the trough at the last-mentioned end of the mold, means for operating the said carriage toward and away from the mold, means for temporarily supporting the opposite end of the trough when in its operative position, and means for cooling the mold during the molding process.

6. .A centrifugal tube molding machine comprising a rotatable mold for the peripheral surfaces of the tubes to be formed, means for rotating the said mold, means for molding the end faces of the tubes, guides extending parallel to theaxis of the mold adjacent to one end of the latter, a carriage slidably mounted on the said guides and being held thereby securely against movement in a lateral direction with respect to the action of the mold, a longitudinally movable filling trough secured at one end to the said carriage to be supported thereby and being adapted to extend through the mold in operative positionvand to be withdrawn completely from one end of the latter into inoperative position, means for operating the said carriage on its guides toward and away from the mold, and means for temporarily supporting the opposite end of the trough when in its operative position.

7. A centrifugal tube molding machine comprising a rotatable mold for the peripheral surfaces of the tubes to be formed. means for rotating the said mold, means for molding the end faces of thetubes, a longitudinally movable filling trough adapted to extend through the mold in operative position and to be withdrawn completely from one end of the latter into inoperative position, a movable carriage permanently supporting the trough at the last-mentioned end of the mold and journaling the same for oscillation upon its axis, means for operating the said carriage toward and away from the mold, means upon which the trough may be oscillated, and means for temporarily supporting the opposite end of the trough when in its operative position and for journaling the same for oscillation.

8. A centrifugal tube molding machine comprisinga rotatable mold for the peripheral surfaces of the tubes to be formed, means for rotating the said mold, a longitudinally movable filling trough adapted to extend through the mold in operative position and to be withdrawn, completely from one end of the latter into inoperative position, a movable carriage permanently supporting the trough at the last-mentioned end of the mold, means for operating the said carriage toward and away from the mold, a ring fitting the end of themold adjacent to the carriage and being adapted to mold the corresponding end face of the tube, and means for molding the opposite end face of each tube.

9. A centrifugal tube molding machine comprising a rotatable mold for the peripheral surfaces of the tubes to be formed,

- means for rotating the said-mold, a longitudinally movable filling trough adapted to extend through the mold in operative position and to be withdrawn completely from one end of the latter into inoperative position, a movable carriage permanently supporting the trough at the last-mentioned end of the mold, means for operating the said carriage toward and away from' the mold, a ring carried by the said trough for movement therewith and being of such a diameter that it is adapted to fit the end of the mold adjacent to the carriage when the trough is in its operative position to mold the corresponding end face of the tube, and means for molding the opposite end face of each tube.

10. A centrifugal tube molding machine comprising a rotatable mold for the peripheral surfaces of the tubes to be formed,

means for rotating the said mold, a longitudinally movable filling trough adapted to of the mold, means for operating the said carriage toward and away from the mold, exteriorly disposed means for supporting the opposite end of the trough when in its operative position within the mold, the said mold having its end adjacent to the last named means enlarged internally to form the exterior surfaces of a pocket in the tubes, a tubular piece adapted to fitwithin the lastmentioned mold end and having an extra flange adapted to form the mold end and to mold the corresponding end face of each tube, means for securing the said piece detachably in its applied position,'a sand mold carried by the said tubular piece and adapted normally to be positioned within the enlarged end portion of the mold to mold the interior surfaces of each tube pocket, the adjacent trough end being adapted to project through the tubular piece in operative position.

'11. A centrifugal tube molding machine comprising a rotatable mold for the peripheral surfaces of the tubes to be formed, means for rotating the said mold, means for molding the end faces of the tubes, a longitudinally movable filling trough adapted to extend through the mold in operative position and to be Withdrawn completely from. one end of the latter, into inoperative position, a movable carriage permanently supportingthe trough at the last-mentioned end of the mold, means for operating the said carriage toward and away from the mold, and tube ejecting means carried by the said trough.

12. A centrifugal tube molding machine comprising a frame, independently adjustable bearings mounted in the frame, bearing wheels journaled in the said bearings, a cylindrical mold mounted rotatably upon the said bearing wheels, means for supplying molten metal to the interior" of the mold, and means by which the said bearings may be adjusted laterally with respect to the mold, the said bearings being mounted in such a manner that certain of the bearing wheels may be adjusted horizontally and the others may be adjusted both horizontally and vertically.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

DIMITRI SENSAUD DE LAVAUD. FERNANDO ARENS, JUNIOR.

Witnesses FoR'rUNATo AoRIs,

MADDIN SEMMES. 

